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MAX2769B
Universal GPS Receiver
Table 9. Configuration 3 (Address: 0010) (continued)
DEFAULT
DATA BIT
LOCATION
VALUE
DESCRIPTION
(PGM = 0)
STRMSTART
STRMSTOP
RESERVED
STRMBITS
STAMPEN
10
9
8:6
5:4
3
0
0
111
01
1
The positive edge of this command enables data streaming to the output. It also enables
clock, data sync, and frame sync outputs.
The positive edge of this command disables data streaming to the output. It also
disables clock, data sync, and frame sync outputs.
—
Number of bits streamed. D5:D4 = 00: reserved; 01: 1 MSB, 1 LSB; 10: reserved, Q
MSB; 11: 1 MSB, 1 LSB, Q MSB, Q LSB.
The signal enables the insertion of the frame number at the beginning of each frame. If
disabled, only the ADC data is streamed to the output.
This signal enables the output of the time sync pulses at all times when streaming is
TIMESYNCEN
2
1
enabled by the STRMEN command. Otherwise, the time sync pulses are available only
when data streaming is active at the output, for example, in the time intervals bound by
the STRMSTART and STRMSTOP commands.
This control signal enables the sync pulses at the DATASYNC output. Each pulse is
DATSYNCEN
1
0
coincident with the beginning of the 16-bit data word that corresponds to a given output
bit.
STRMRST
0
0
This command resets all the counters irrespective of the timing within the
stream cycle.
Table 10. PLL Configuration (Address: 0011)
DEFAULT
DATA BIT
LOCATION
VALUE
DESCRIPTION
(PGM = 0)
RESERVED
RESERVED
RESERVED
REFOUTEN
RESERVED
27
26
25
24
23
1
0
0
1
1
—
—
—
Clock buffer enable. Set 1 to enable the clock buffer or 0 to disable the clock buffer.
—
Clock output divider ratio. Set D22:D21 = 00: clock frequency = XTAL frequency x 2;
REFDIV
22:21
11
01: clock frequency = XTAL frequency/4; 10: clock frequency = XTAL frequency/2;
11: clock frequency = XTAL.
IXTAL
RESERVED
LDMUX
Maxim Integrated
20:19
18:14
13:10
01
10000
0000
Current programming for XTAL oscillator/buffer. Set D20:D19 = 00: reserved; 01: buffer
normal current; 10: reserved; 11: oscillator high current.
—
PLL lock-detect enable.
21
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